Mitsubishi ML-TS2
This page was last modified 20:42, 4 October 2022 by Zeilemaker54. Based on work by Mars2000you and Rderooy and others.




The ML-TS2 is a very special MSX2 computer, also called the telephone-computer. It has only 64Kb RAM and is without any disk drive.

There are 2 versions of this machine:

  • the ML-TS2 is provided without telephone and covers the location reserved for that
  • the ML-TS2H has this device built-in

Both versions come with a specific slot doubler (EX-Box). The power supply ID87 is external.

Brand Mitsubishi
Model ML-TS2
Year 1987-11
Region Japan
Launch price ¥65,000 for the ML-TS2
¥75,000 for the ML-TS2H
¥10,000 for the ML-TS2 to ML-TS2H kit (ML-HS)
RAM 64kB in slot 3-2
VRAM 128kB
Media MSX cartridges
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-Engine S1985)
Chipset Yamaha S1985
Keyboard layout QWERTY/JP50on + numeric keypad
Extras Telecom firmware, Modem, MSX-Modem BASIC, Kanji-ROM level 1 & 2, slot doubler, (only on ML-TS2H) dedicated telephone
Emulation partially emulated - the firmware ROM needs to be checked more deeply


From MSX-BASIC, you can access the firmware of this Telecom Station with CALL TELECOM or _TELECOM.

This firmware also includes MSX-Modem BASIC.


Mitsubishi ML-TS2 manual
Mitsubishi ML-TS2
Mitsubishi ML-TS2 PCB
Mitsubishi ML-TS2H box and content
Mitsubishi ML-TS2H
Mitsubishi ML-TS2H + slot doubler and PSU
Mitsubishi ML-TS2(H) back
Mitsubishi ML-TS2H label
Mitsubishi ML-TS2 underside
Mitsubishi ML-TS2 label
Mitsubishi ML-TS(H) power supply
Mitsubishi ML-TS2(H) slot doubler
Mitsubishi ML-TS2(H) slot doubler inserted in cartridge slot


The ML-TS2 is a MSX2 with one or two cartridge slots, a Z80A from NEC (D780C-1) and an MSX-Engine S1985 from Yamaha. The modem speed is 300/1200bps. The keypad is made up of ten numbers and a RET key only. It is intended to dial a phone number.

Power supply adapter specifications:

  • Input: 100V, 14VA
  • Output: AC 8V, 1.2A and +8.5V, 0.1A

Slot Map

Slot 0 Slot 1 Slot 2 3-0 3-1 3-2 3-3
Page C000h~FFFFh Cartridge
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Network*
Page 0000h~3FFFh Sub-ROM Modem

(*) The 64kB firmware rom is in slot 3-1, it has a mapper and is composed of 8 blocks of 8kB. It has also 8kB SRAM.